标签:chart class port types client png invoke signal 方法
新建Webapi项目
创建 ChatHub
类,继承于 Hub
public class ChatHub : Hub
{
public async Task SendMessage(string user,string message)
{
await Clients.All.SendAsync("ReceiveMessage", user, message);
}
}
启用ChatHub,将ChartHub映射到路径 /chathub
下(需要前后端约定)
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
endpoints.MapHub<ChatHub>("/chathub");
});
后端启用CORS
8080是前端的端口,前后端分离需要设置跨域,否则无法正常访问
//ConfigureServices
services.AddSignalR();
//Configure
app.UseCors(builder => {
builder.WithOrigins("http://localhost:8080")
.AllowAnyMethod()
.AllowCredentials()
.AllowAnyHeader();
});
通过刚才的代码,我们将 ChatHub 下的方法映射到路径 /chathub 下
前端引入 @microsoft/signalr
,使用 npm install进行安装
"dependencies": {
"@microsoft/signalr": "3.1.2",
"core-js": "^3.6.4",
"element-ui": "^2.13.0",
"vue": "^2.6.11",
"vue-class-component": "^7.2.2",
"vue-property-decorator": "^8.3.0",
"vue-router": "^3.1.5",
"vuex": "^3.1.2"
},
具体Element-ui以及路由不再赘述,可以看之前的文章。
新建Chat.vue,设置路由,具体代码如下
<template>
<div class="hello">
<!-- <img alt="Vue logo" src="../assets/logo.png"> -->
<el-input type="textarea" :rows="10" v-model="textarea1" style="width:45%">
</el-input>
<div>
<el-input v-model="name" placeholder="姓名" style="width:200px"></el-input>
<el-input v-model="message" placeholder="信息" style="width:200px"></el-input>
<el-button type="primary" @click="send">发送</el-button>
</div>
</div>
</template>
<script lang="ts">
import { Component, Prop, Vue } from ‘vue-property-decorator‘;
import * as signalR from ‘@microsoft/signalr‘;
@Component
export default class Chat extends Vue {
@Prop() private msg!: string;
// var divMessage: HTMLDivElement = document.querySelector(".hello");
private textarea1 = ‘1231‘;
private name= ‘‘;
private message= ‘‘;
private hubConnection: signalR.HubConnection = new signalR.HubConnectionBuilder()
.withUrl("https://localhost:44342/chatHub")
.withAutomaticReconnect()
//.configureLogging(signalR.LogLevel.Information)
.build();
mounted() {
this.start();
this.hubConnection.on("ReceiveMessage",(name,message)=>{
this.textarea1 = this.textarea1.concat( ‘\r\n‘ + name + ‘:‘
+ message);
});
}
start(): void {
this.hubConnection.start()
.then(a=>{
if(this.hubConnection.connectionId){ //this.hubConnection.invoke("SendMessage",this.name,this.message).catch(err=>console.log(err.toString()));
}
});
}
send(){
this.hubConnection.send("SendMessage",this.name,this.message);
}
}
</script>
前端显示如下
import * as signalR from ‘@microsoft/signalr‘;
将SignalR引入到当前页,定义hubConnection继承于signalR.HubConnection。
通过withUrl("https://localhost:44342/chatHub")将前端跟后端提供的接口绑定(后端启动端口是44342)。
this.hubConnection.on("ReceiveMessage",(name,message)=>{
this.textarea1 = this.textarea1.concat( ‘\r\n‘ + name + ‘:‘
+ message);
前端监听 ReceiveMessage
方法,该方法需要和后端提供一样的签名,作用是将接收到的name和message属性打印到页面上。
定义Send方法,将在点击按钮的时候出发Click事件,将信息发送
send(){
this.hubConnection.send("SendMessage",this.name,this.message);
}
具体效果如下
配合使用 ASP.NET Core SignalR 和 TypeScript 以及 Webpack
标签:chart class port types client png invoke signal 方法
原文地址:https://www.cnblogs.com/imstrive/p/12502939.html